Tomos A31988 - Page 12

Classic Cycles Technical Resources
12
CYLINDER
D (mm, in)
A
B
38.01
+0.01
(1.4964
+0.0024
in)
38.02
+0.01
(1.4968
+0.0024
in)
D > D
1
max 0.012 mm
Ma x permissible bore taper: 0.006mm
PISTON
D1
D2
D3
D4
A
37.95
+0.01
37.91
+0.01
37.87
+0.01
37.85
+0.01
B
37.96
+0.01
37.92
+0.01
37.88
+0.01
37.86
+0.01
L = 50 mm
L= 52.5 mm
L = 55 mm
Piston I. oversize: Ø 38.50mm
The cylinder must be bored and honed as shown in the table:
OVERSIZE CYLINDER
D (mm, in)
A
B
38.51
+0.01
38.52
+0.01